Manufacture of mortar for bricklaying



106-.COMPOSITIONS,

' COATING OR; PLASTIC.

. g and adapted to become a mortar by 4 addition of water.

Patented J m; 25: I t

.MANUFACTURE OF MOPtTAR FOR BRIGKLAYING- No Drawing.

To all whom it may concern:

Be it known that I, LUTHERU. PowERs, a citizen of the United States, residin at Knoxville, in the county of Knox and tate of Tennessee, have invented a new and useful Improvement in the Manufacture of Mortar for Bricklaying, of which the following is a specification.

My improvement relates particularly to a mortar mixture of materials in dry foam The object of the invention is to produce such a mixture which shall be adapted to become a mortar well suited for the laying of brick in brick walls and other situations.

Such a mortar should, after setting, be strong. and durable against the actlon of g, i the elements, and it should have uniform texture, and it should not contract or shrink during or after setting.

Preparing this mixture in dry form has advantage, because large quantities can be prepared with the same proportions of ingredients, whereby uniformity of quality '1 is attained, and small or large quantities of the mixture can then be transported and converted into mortar at the convenlence of the brick layers.

- are as follows:

Four

-.The ingredients of my improved mixture thor digl niidfis'r'ererably in a ro ary drier;

One p agt qf cla chemical analysis of which is give]; Below, said clay being thoroughly driedand pulverized;

' on My" iied;

ne pal:t 1?ortlandcemgnt, The analysis o e a ova-mentioned clay Two arts ulverized lime stone thoris as follows:

. Percent.

Silica 69.40 Iron oxide 6.48'

. Alumina 13.52 Manganese Trace Lime .34

Magnesia .81 Loss on 'ignition l.. 7 .56 Alkalis (dif.) t 1.89

On burning, this clay becomes several "shades darker in color, but it shows com- ,paratively little contraction. g

Application filed October 26, 1922. Serial No. 597,180.

parts of sharp, clean sand,

These several materials are to be mechanically mingled or mixed with each other in substantially the above-mentioned propor-" tions, the-materials being heated before the f r mixing operation is begun and the heat be-v ing maintained during the mixing'operation. The mixing is preferably done by means of mixing machines adapted to sep hold masses of the several materials aratel and eliver from each mass the required proportion into a compartment in which, the united mass is sufliciently agitated to]? efi'ect complete intermingling of the several 1 materials.

In the above operation, before the mixing, the pulverized lime stone should be heated to about 1200 degrees (Fahn) to thoroughly dry, but not enough to burn into lime.

The clay has the quality indicated jth above noted analysis and the above statement that, on burning, this clay shows sev- I eral shades darker in color, but it shows comparatively little contraction. Such a clay is plastic and in the finished product this clay is fire-proof. Ordinary clays will notanswer for this operation. Before being put into the mixture, this cla subjected to a drying heat of a out 900 degrees (Fahn). r

As above stated, heating of the several materials is maintained during the mixing operation, such heating being for the pur-j pose of further drying the materials.

As above stated, the object of my inveni tion is to produce a dry mixture adapted to form a mortar well suited for use in brick laying. Through long experience in brick laying and in other work involving the use of mortar, I have learned that for brick laying there is need of a mortar havin special qualities not needed in mortar use for other purposes, for example, the vari- .ous kinds of wall plastering.

I claim as my invention: 1. The herein described mg1 ;h o d o f forming a dry mortar mixture for brick laying,

which method consists in heat-treating for drying pulverized lime stone and sand and clay of substantially the kind herein described, and mechanically combining and intermingling four parts of said sand, one part of said clay, two parts of said pulverized lime stone, and one part of Portland ce-' should be v k\n ment, sai'd ingredients being heated for drying during the progress of the mixing,--sub-.

stantially'as described. v 2. As an article of manufacture, a dried 5 mortar mixture comprising substantially four parts of dried sand, two parts of dried pulverized lime stone, one part of dried 

